Lock.



.1. PRINZLER.

LOCK.

APPLICATION FILED AuG.I4. |914.

Patented Nov. 2, 1915.

2 SHEETS-SHEET l.

W/ TN E SSES.'

C. J. PRINZLER.

LOCK.

APPLICATION FILED AUG.I4. 1914.

1,158,845. Patented Nov. 2, 1915.

2 SHEETS-SHEET 2.

CARL J'. PRINZLEB, OF INDIANAPOLIS, INDIANA, ASSIGNOR T0 `WON DUPRIN FIRE EXIT LATCH COMPANY, A COPARTNERSHIP COMPOSED 0F VONNEGUT HARDWARE CO., A CORPORATION OF INDIANA, AND CARL J. PRINZLEB AND HENRY H. DUPONT,

BOTH 0F INDIANAPOLIS, INDIANA.

LOCK.

To all 'whom t may concern.

Be it known that I, CARL J. PmNzLER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Lock, of which the following is a specication.

The object of my invention is to produce a lock especially designed for use in connection with a so-called panic bar which normally lies across the inner face of the door in such manner that persons crowding against the same will automatically cause the release of the door, the construction of my present lock being such that the single locking member, which is in the form of a latch bolt, may be locked against retraction from the exterior of the door without interfering with the retraction of. the latch bolt by means ofthe panic bar; which will also permit the retraction and holding of the latch bolt in retracted postion by manipulation of a key; and which will also automatically withdraw the dogging mechanism from the latch bolt when the door is open.

The accompanying drawings illustrate my invention.

Figure 1 is an elevation of the lock, with the face plate removed, and with the parts in the positions occupied when the door is closed and locked against external manipulation; Fig. 2 a similar view when the latch bolt has been retracted by manipulation of the panic bar; Fig. 3 a similar View with the parts in the positions occupied when the latch bolt has been released for manipulation by the external thumb piece; Fig. 4a similar view-with the parts in the positions occupied when'the latch bolt has been retracted and locked in retracted position;

. Fig. 5 a section on line 5 5 of Fig. 3; Fig.

6 a section on line 6-6 ofFig. 3; and Figs. 7 and 8 perspectives of the bolt whichpis used for (logging the thumb pieceA block.

The lock has been illustrated in the form of a mortise lock with la cylinder key lock. of com rnon typev for controlling its manipulation and inthe drawings 10 indicates the main casing comprising the face plate 11 having an opening 12 through it for the latch bolt 13 and an opening 14 for the dog .controlling plunger 15. The latch bolt 13 is pivoted at 17 in the face plate 11 and piv- Patented Nov. 2, 1915.

Application led August 14, 1914. Serial No. 856,753.

ally extending plate 22 by means of which the stem may be manipulated. Surrounding stem 19 is a spring 23 which acts against the stump 24 to normally project the latch bolt from the casing.

Near the lower inner corner of the casing l0 are mounted two sliding thumb piece heads 25 and 26, the head 25 overlying the head 26 so that two of the edges of these heads lie substantially in the same plane, sliding against the. stumps 27, 27 and provided with notches 25 and 26', respectively. These two heads 25 and 26 are individually accessible from the exterior of the casing and are independently movable. Slidably mounted between the stumps 27 is a flogging bar 28 provided upon one face with a stump 29 adapted to be received in either one of a pair of notches 30, 30 formed in the upper and lower edges of a dog 31 provided at one corner with a tail 32 which is formed for projection into one or the other of the notches 25 and 26', depending upon the positioning of the dog 31 relative to the dogging bar 28. Pivoted on the stump 33 is a lever 34 having a broad end'35 positioned to be engaged by either one of the heads 25 and 26. The lever 34 also normally engages one arm of a lever 36 which is pivoted on the stump 37. The end of lever 36 opposite from that which is engaged by the lever 34 is arranged to be engaged by a lever 38 which is pivoted upon a stump 39 and near this end of lever 36 is a cam lug 40.

Pivoted upon stump 37 and overlying lever 36 and extending in a general direction parallel with stem 19 is a lever 41 having an upwardly extended cam tip 42. Lever 41 is perforated at 43 for the reception of a pin 44 carried by lever 36, the pin- 44 being somewhat smaller than the perforation 43. Pivoted upon the stump 45 and lying between levers 36 and 41 is a latch dogging lever 46, the free end of which sadapted under proper conditions to be projected behind the dogging shoulder 21. Lever 46 at its inner end is provided with a cam tail 48 and at an intermediate point with a cam finger 49 arranged for coaction withthe lug 40. Lever 41 is engaged by a spring 51 which normally urges the same upwardly.

Slidably mounted in the casing substantially parallel with stem 19is a key bar 52 formed at 53 for the reception of a key or key-controlled finger 54. The bar 52 carries a stump 55 upon which is pivoted a tumbler 56, said tumbler having one end 57 associated with the portion 53 of the key bar so as to be controlled by the key or lever 54 and this tumbler is provided with a iinger 58 which coperates with a stump 59 in casing 10 to control the manipulation of the bar 52 and prevent its accidental displacement from either extreme position. vTumbler 56 is also provided on its upper edge with a` cam finger 61 and a dogging cam finger 62.

. The tumbler 56 is normally urged to the p0- sition shown in full lines in Figs. 1, 2 and 4 and in dotted lines in Fig. 3 by a sprlng 63 which ris carried by the bar 52., I

Pivoted on stump 39 is a lever 64 having a block 65 formed for engagement by the fingers 61 and '62 of tumbler 56 and also having a' tip 66 adapted to be engaged, 1n one position by the arm 54. Lever 64 upon the face opposite to that shown' in the drawlngs, is provided with a lu 6L(dotted lines Figs. 1 and 2) which over ies the upper edge of lever 38.

The sliding bar 52 is provided with a de- I pending finger 68 having a notch 69 in `which is laid the stem 15 of the plunger 15, a spring 71 surrounding said stern and acting upon the plunger and finger 68 to normally project thev plunger from the faceplate of .the casing. At its inner end the plunger 15 is provided with a cross piece 72 which serves tolimit the movement of the plunger relative to the bar 52 and also acts upon the cam finger 42 of the lever 41. .Bar 52 carries a depending linger 73 which lies between fingers 48 and 49 of lever 46 and coacts with the finger 48 'to swing said lever 46.

Plunger 15 is provided at its outer end I with a head 15 which is oppositely beveled from its middle by two diverging vertical planes so that lateral movement of the entire lock relative to an adjacent strike will cause an inward rejection of the plunger if it is in outwardoly projected position.

Pivoted on stump 81 is a lever 82 which engages the dogging bar 28 and the sliding bar 52.

The above described lock is primarily designed for use with a door equipped upon its outer face with an ordinary thumbpiece and upon its inner face with a panic bar which extends across the face of the door and is capable of movement laterally of the plane of thedoor and the operation is as follows: The parts will normally lie in the positions shown in full lines in Fig. .3 except that the key controlled arm 54 will lie in the position shown in Figs. 1 and 2. In these positions of the parts, the plunger 15 is held retracted by the sliding bar 52 and cam finger 73 of said bar 52 has acted upon the cam finger 48 of lever 46 to Withdraw' said lever from behind the'dogging shoulder 21 of stem 19; lever 82 has acted upon the dogging bar 28 to retract dog 32 from headl said lever against cross head 22v to move A stem 19 and retract the latch bolt.

Fig. 3 shows the condition of the parts just as the bar 52 has been driven by arm 54 to the externally unlocked position and before the tumbler 56 has resumed its normal position, and ifvthe key be turned in the direction indicated by the arrow in Fig. 3, past the normal withdrawing position of the key, the arm 54 will come into engagement with the tip 66 of lever 64 and throw said lever downwardly to the position shown in Fig. 4. This movement of lever 64 brings lug 67 into engagement with lever 38 and causes said lever to swing downwardly, its

los

finger 64 overlies the block 65 and holdsA lever 64 in its depressed position, thus locking the latch bolt in retracted position so that the door will be free for movement without necessity of manipulating any of the operating members normally provided for that purpose. When the lever 64 has thus been depressed and locked in its depressed position, the key may be turned` backwardly about half a turn so as to bring the arm 54 to lthe position shown in Figs. 1 and 2 and the key withdrawn. By turning the key in the direction opposite to that in icated by the arrow in Fig. 3, arm 54 will be first brought into contact with the vtumbler 56 so as to depress said tumbler,

whereupon lever 64 is immediately released and, because of the action ofl spring 23 through levers 36 and 38, lever' 64 will be automatically thrown up to the position shown in Fig. 3 and, if desired, the arm 54 may be immediately returned to its normal position and the key withdrawn without any movement of the bar 52 and thus without any clogging.; action upon head 25 and consequent lockingof the door from exterior manlpulation. 'If desired, however, the key in Fig. 1 so that the cross head 72 of the plunger 15 will engage the cam finger 42 of lever 41 to move it downwardly to the posif tion indicated by dotted lines in Fig. 1 and thereby, through perforation 43 and pin 44, swing the dogging lever 46 upwardly from behind shoulder. 21, the said dogging lever 46 having been just previously projected to the position shown in full lines in Fig. 1 by the withdrawal of the cam finger 73 from engagement with the cam linger 48. This automatic action of the plunger 15 upon the lever 41 is important because it immediately frees the latch bolt for manipulation either by the thumb piece, the panic bar, or by mere engagement of the latch bolt with the strike of angadjacent door or post as the door is swung to closed position.

Whenever the door is swung to its closed position with the parts as above described, the latch bolt will be first moved inwardly by coperation with the strike plate and at the same time the head 15 of the plunger 15 coperating with an imperforate portion of the strike plate, will be moved inwardly.

so as to free levers'41 and 46 but this action on the plunger 15 takes place after shoulder 21 has passed beneath the free end of lever 46 so that the inward movement of the latch bolt is not interfered'with but, as soon as the door has reached its final or closed position and the latch bolt snaps into the strike plate, the clogging lever 46 drops behind shoulder 24 and thus automatically locks the latch bolt against any retraction by shaking the door or by means of the insertion of any instrument between the face plate ,11 and the strike plate. The parts will thus be in the positions indicated in Fig. 1, the shiftf ing ofthe bar 52 having operated upon lever 82 to throw the dog 32 into notch 25 and thus lock the mechanism against manipulation by means of the external thumb piece which engages the head 25. The head 26 is free for manipulation by movement of the panic bar (not shown) so that when said head 26 is thrown up to the position shown in Fig. 2, it acts on lever 34 which in turn acts upon lever 36. There is a slight lost motion between the projected position of shoulder 21 andthe (logging lever 46 and lug 40 is in engagement with finger 49 so that the ducing a very small movement of the latch Vbolt stem 19 produces, through `the cams 40 and49, ya rapid movement of the flogging lever 46 so as toA retract it fully from behind shoulder 21 before there is any material movement of stem 19 whereupon the further vinitial vmovement of lever 36, while proi upward movement of head 26 serves to fully retract the latch bolt.

j -When the parts are in the positions shown in Fig.A 1, lever 64 has been moved, by the action of cam finger 62 against block-65, to a. position where the tip 66 is entirely beyond .the path of movement of the arm 54 so that,

when an unlocking of the external manipulator or thumb piece is desired, the arm 54 may be swung down in the direction indicated by the arrow in Fig. 3 to first engage the tumbler 56 so as to withdraw its lug 58 from behind stump 59 and then shift the bar 52 to the right into the position shown in Fig. 3, this operation, by reason of the coaction between finger Gland block 65 bringing the tip 66 of lever 64 down tothe position shown in Fig. 3 where it is in the path of movement of arm 54 if said arm is carried far enough,

I claim as my invention:

l. In a lock, the combination with the casing, of a latch bolt yieldingly projected from the casing and provided with an inwardly presented shoulder, a (logging lever arranged to lie behind said shoulder, a key-controlled slide, a plunger carried by said slide and yieldingly movable relative thereto to be yieldingly projectable from the casin and means operated on by said plunger or retractingthe dogging lever from behind the latch bolt when the plunger is projected into the casing. y

2. In a lock, the combination with the casing, of a latch bolt yieldingly projected from the casing and provided with an inwardly presented shoulder, a dfogging'lever arranged ,to lie behind said shoulder, a key-controlled slide, a plunger carried lby said slide and .yieldingly .movable relative thereto to be yieldingly projectable from the casing, means operated on by said plunger for retracting the dragging lever from behind the latch bolt when the plunger is projected into the casing, and cam members carried by the slide and dogging lever whereby the dogging lever is moved into and out of dogging position by reciprocation of the slide.

3. In a lock, the combination with a casing, of a latch bolt yieldingly projectable from the casing and provided with an inwardly presented shoulder, a dogging lever arranged to lie behind said shoulder and provided with a cam, a cam lever connected with said dogging lever and normally urged in one direction to move the (logging lever to dogging position, a plunger yieldingly projectable from the casing and provided with a i normally urged in one direction to move the dogging lever to dogging position, a plunger yieldingly projectable from the casing and provided with a cam end for coperation with a strike, said plunger having a portion engaging said cam lever to retract the dogging lever from dogging position when the plunger is projected from the casing.

5. In a lock, the combination with a casing, a yieldingly proj ectable latch bolt having an inwardly presented shoulder, a lever engaging said latch bolt for retracting the same, a dogging lever arranged to lie behind said inwardly presented shoulder, a pair of cooperatin cam pieces carried by said two levers W ereby movement of the first-mentioned lever to latch-retracting position will inwardly withdraw the dogging lever from dogging position, a key-controlled lever, means for shifting said lever into and out of key--actuatable position, and means controlled by said last-mentioned lever for driving the first-mentioned lever to 'latch-retracting position. y

6. In a lock, the combination with a casing, a yieldingly projectable latch bolt havf ing an inwardly presented shoulder, a lever engagin said latch bolt for retracting the same, a ogging lever arranged to lie behmd said'inwardly presented shoulder, a pair of coperating cam pieces carried by said two levers whereby movement of the first-mentioned lever to latch-retracting position will inwardly withdraw the dogging lever from dogging position, a key-controlled lever, means for shifting saidlever into and out of key-actuatable position, means controlled by said last-mentioned lever for driving the first-mentioned lever to latch-retracting position, and key-controlled means for dogging said key-controlled lever in latch retracting position. n

7. In a lock, the combination wlth the casf ing, of a yieldingly projectable latch bolt, a

lever operating upon the same' to retract it,

a second lever operating upon the first lever to drive it in. latch-retracting direction, a key-controlled lever arranged to act upon said second lever in latch retracting direction, a key controlled slide, a tumbler mounted on said slide, a stump coperating with said tumbler, cam and catch portions carried by said tumbler and coperating with the key-controlled lever to shift the same into and out of key-actuatable position and to hold ,the same in latch-retracting position, af 'cam lever connected with the dogging lever,`

said second lever in latch-retractingdirection, a key-controlled slide, a tumbler mounted on said slide, a stump coperating with said tumbler, and cam and catch portions carried by said tumbler and coperating with the key-controlled lever to shift the same into and out of key-actuatable position and to hold the same in latch retracting position.

9. In a lock, the combination with the casing, of a yieldingly projectable latch bolt, a lever operating upon the same to retract it, a second lever operating'upon the first lever to drive it in ,latch-retracting direction, a key-controlled lever arranged to act upon said second lever inV latch retracting direction, a key controlled slide, a tumbler mounted on said slide, a stump coperating with said tumbler, cam and catch portions carried by said tumbler and coperating with the key-controlled lever to shift the same into Y and out of key-actuatable position and to j hold the same in latch--retracting position, a cam lever connected with the vdogging lever, a plunger carried by the key bar and yieldingly movable relative thereto and yieldingly projectable from the casing, said plunger having a portion engaging said cam lever to retract the'dogging lever from dog-` with said tumbler, cam and catch portionsV carried by said tumbler and coperating with the key-controlled lever to shift the same'into and out of key-actuatable position and to hold the same in latch-retracting position, and coperating cam portions carried by said key bar and dogging lever.

1l. In a lock, the combination with the casing, of a yieldingly projectable latch bolt, a lever operating upon the same to retract it, a second lever operating upon the first lever to drive it in latch-retracting direction, a key-controlled lever arranged to act upon said second lever in latch retracting direction, a key controlled slide, a tumbler mount- -ed on said slide, a stump cooperating with said tumbler, cam and catch portions carried by said tumbler and cooperating with the key-controlled lever to shift the same into and out of key-actuatable position and to hold the same in latcli-retracting position, a cam lever connected with the dogging lever, a plunger carried by the key bar and yieldingly movable relative thereto and yieldingly projectable from the casing, said plunger having a portion engaging said cani lever to retract the dogging lever from dogging position When the plunger is projected from the casing, and coperating cam portions carried by the clogging lever and latchactuating lever.

12. In a lock, the combination with the casing, of a yieldingly projectable latch bolt, a lever operating upon the same to retract it, a second lever operating upon the first lever to drive it in latch-retracting direction, a key-controlled lever arranged to act upon said second lever in latch-retracting direction, a key-controlled slide, a tumbler. mounted on said slide, a stump coperating With said tumbler, cam and catch portions carried by said tumbler and cooperating with the key-controlled lever` to shift the same into and out of key-actuatable position and to hold the same in latch-retracting position, and coperating cam portions carried by the deggng lever and latch-actuating lever.

13. 111 a lock, the combination with the casing, of a yieldingly projectable latch bolt,

a lever operating upon the same to retract it, a Second lever operating upon the first lever to drive it in latch-retracting direction, a key-controlled lever arranged to act upon said second lever in latch retracting direction, a key controlled slide, a tumbler mounted on said slide, a stump coperating With said tumbler, cam and catch portions carried by said tumbler and coperating with the key-controlled lever to shift the same into and out of key-actuatable position and to hold the same in latch-retracting position, a cani lever connected with the dogging lever, a plunger carried by the key bar and yieldingly movable relative thereto and yieldingly projectable from the casing, said plunger having a portion engaging said cam lever to retract the clogging lever from dogging position when the plunger is projected from the easing, and cooperating cani portions carried by the key bar and the doggiug lever and coperating cam portions carried by the dogging lever and the latch-actuating lever.

1l. In a lock, the combination with the casing, of a yieldingly projectable latch bolt, a lever operating upon the same to retract it, a second lever operating upon the first lever to drive it in latch-retracting direction, a key-controlled lever arranged to act upon said second lever in latch-retracting direction, a key-controlled slide, a tumbler mounted on said slide, a stump coperating with' said tumbler, cam and catch portions carried by said tumbler and coperating with the key-controlled lever to shift the saine into and out of key-actuatable position and to hold the same in latch-retracting position, and cooperating cani portions carried by the key bar and the (logging lever and coperating cam portions carried by the dogging lever and the latch-actuating lever.

In witness whereof, I have hereunto setnly hand at Indianapolis, Indiana, this lth day of August, A. D. one thousand nine hundred and fourteen.

CARL J. PRINZLER. Witnesses FRANK A. FAHLE, MA1' LAYDEN. 

